Valve.



w. c. MARSH. VALVE.

APPLICATION FILED SEPT. 10,1910.

Patented Nov. 28, 1911.

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:1 Home ing adapted to engage a va ve seat 19 in the '3, to which may beconnected, by a union UNITED STATES PATENT OFFICE.

WILLIAM C. MARSH, 0F DUN KIRK, NEW YORK, ASSIGNOB 10 MARSH VALVECOMPANY, OF DUNKIRK, NEW YORK, A CORPORATION OF NEW YORK.

VALVE.

Specification of Letters Patent.

Patented Nov. 28, 1911.

Application filed September 10,1910. Serial No. 581,483.

To all whom it may concern:

Be it known that I, WILLIAM C. MARSH, a citizen of the United States,residing at Dunkirk, in the county of Chautauqua and State of New York,have invented new and useful Improvements in Valves, of which thefollowing is a specification.

My invention relates to valves more especially adapted for use withradiators, and

as for its object to provide a valve of novel construction embodying notonly a main closure but also a closure for preventing leakage throughthe valve stem or stufiing box when the main valve is open.

In the accompanying drawing, the figure is a central vertical sectionalview of my improved valve.

In the said drawing the reference numeral 1 denotes the body of aradiator valve, having the interiorly threaded inlet aperture 2 for thereception of the supply pipe, and the exteriorly threaded discharge nut4, a short threaded pipe section or ni pie 5, for connection with aradiator. T e upper side of the body 1 is apertured and interiorlyscrew-threaded at 6 to receive a bonnet piece 7, which in turn carries apacking nut 8 at its upper end, between which and the upper end of saidbonnet piece a packing 9 is interposed.

Passing centrally through the packing nut 8, packing 9 and the bonnetpiece 7 is a valve stem 10 provided intermediate its length with aright-hand screw thread 11, in threaded engagement with the bonnet piece7 so that the stem 10 will move up and down in said bonnet piece whenrotated by a suitable handle 12. At its lower end said stem 10 isreduced in size at 13, and has secured thereon, by a left hand screw, anenlarged nut 14, rounded on both its upper and under sides, as shown,over which fits a disk holder 15, the same being retained in position byan apertured nut 16, loosel surrounding the reduced lower end 13 ofvalve stem 10 and screwed into said disk holder 15 with a left handscrew thread. The lower surface of said disk holder 15 is recessedannularly to receive a'suitable hard packing disk 17, which is retainedin position by a washer 18, said acking disk bebody 1 when said valvedisk holder is in its l The upper surface of said disk holder 15 has anannular recess adapted to receive a suitable hard packing disk 20,which, when said disk holder is in its uppermost position, contacts withan annular seat 21 formed on the bonnet piece 7 around the stem 10, saidpacking disk being retained in position by a flange 16 formed on the nut16, as shown.

In operation a rotation to the right of stem 10' will, through thread11, cause a bodily downward movement of stem 10 and disk holder 15 untilpacking disk 17 contacts with valve seat 19, thus closing the valve. Inopening, the movement of stem 10 is reversed, and as the valve is openedthe packing disk 20 comes in contact with its seat 21, thus preventingthe escape of fluid through the bonnet piece 7.

To assemble the parts I first lace the nut 16 in position on the lowerre uced end 13 of stem 10; then screw the nut 14 thereon;

and finally apply the disk holder 15 byscrewing it onto the nut 16. Bymeans of this construction I rovide a-rocking connection between thedisk holder 15 and stem 10, which is aiforded by the nut 14 rounded onits upper and under sides, so that both the packing .disks 17 and 20will seat snugly when brought a ainst their respective seats.

Having thus escribed my invention,'what I claim as new and desire tosecure by Letters Patent is i 1. A valve, embodying a casing, alongitudinally movable valve stem therein, oppositely disposed seats insaid casing, a nut mounted on the lower end of said stem an integraldisk holder in said casing carryln oppositely disposed disks forengaging sal seats and embracing said nut, and an apertured nut looselysurrounding said stem and in screw-threaded engagement with said diskholder, said apertured nut loosely engaging said first mentioned nut toretain said disk holder on said stem, the oontactin surfaces of theparts being such that sai disk holder is permitted a bodily rockingmovement when moving into contact w1t either seat.

2. A valve, embodying a casing, a stem rotatable and bodily movable insaid casing and having a reduced lower end, oppositely disposed seats insaid casing, a nut having rounded upper and under sides mounted on thelower redueed end of said stem, an insaid disks to retain said disk insaid disk 10 tegral disk holder carrying 0p ositely disholder. poseddisks for engaging sai seats and In testimony whereof I have hereuntoset embracing said nut, and an apertured nut my hand in the presence oftwo subscribing loosely surrounding said stem and in screwwltnesses.

threaded engagement with said disk holder, WILLIAM C. MARSH. saidapertured nut loosely engagin said Witnesses: first mentioned nut toretain sai disk FRED. J. REED,

holder on said stem and engaging one of V. L. R. MARSH.

